From: Michael Hanke Organization: NADA, KTH To: pgcc AT delorie DOT com Subject: Re: pgcc didn't perform for me Date: Fri, 29 Sep 2000 08:34:08 +0200 X-Mailer: KMail [version 1.0.28] Content-Type: text/plain References: In-Reply-To: MIME-Version: 1.0 Message-Id: <00092908391500.02822@struppi> Content-Transfer-Encoding: 8bit Reply-To: pgcc AT delorie DOT com Thadeu Penna wrote on Don, 28 Sep 2000: > We have used pgcc-2.95.3 on Athlons with great success (35% or more > compared to gcc). We work on simulations on Statistical Physics and other > number-crunching Condensed Matter stuff (lot of matrix operations, etc.) > Actually pgcc-2.95.3 is as good as Agcc (Athlon specific patch) that > appeared recently on Freshmeat. Hi! This sounds rather interesting for me since I am working with number crunching applications on an Athlon, too. I made some tests with egcs-1.1.2 and pgcc-2.95.3. It turned out that (besides other switches) -march=486 on egcs gave best performance. So my questions are: Which switches do you use for this increase in performance for (double precision) floating point arithmetic? Where can I find Agcc? I have some short (1000 lines) but timecritical routines. Thanks! Michael -- +---------------------------------------------------------------+ | Michael Hanke Royal Institute of Technology | | NADA | | S-10044 Stockholm | | Sweden | +---------------------------------------------------------------+ | Visiting address: Lindstedtsvaegen 3 | | Phone: + (46) (8) 790 6278 | | Fax: + (46) (8) 790 0930 | | Email: hanke AT nada DOT kth DOT se | | na DOT mhanke AT na-net DOT ornl DOT gov | +---------------------------------------------------------------+